1 /* 2 * 3 * Copyright (c) 2015 Linaro Limited 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2 or later, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program. If not, see <http://www.gnu.org/licenses/>. 16 * 17 * Emulate a virtual board which works by passing Linux all the information 18 * it needs about what devices are present via the device tree. 19 * There are some restrictions about what we can do here: 20 * + we can only present devices whose Linux drivers will work based 21 * purely on the device tree with no platform data at all 22 * + we want to present a very stripped-down minimalist platform, 23 * both because this reduces the security attack surface from the guest 24 * and also because it reduces our exposure to being broken when 25 * the kernel updates its device tree bindings and requires further 26 * information in a device binding that we aren't providing. 27 * This is essentially the same approach kvmtool uses. 28 */ 29 30 #ifndef QEMU_ARM_VIRT_H 31 #define QEMU_ARM_VIRT_H 32 33 #include "exec/hwaddr.h" 34 #include "qemu/notify.h" 35 #include "hw/boards.h" 36 #include "hw/arm/boot.h" 37 #include "hw/block/flash.h" 38 #include "sysemu/kvm.h" 39 #include "hw/intc/arm_gicv3_common.h" 40 #include "qom/object.h" 41 42 #define NUM_GICV2M_SPIS 64 43 #define NUM_VIRTIO_TRANSPORTS 32 44 #define NUM_SMMU_IRQS 4 45 46 #define ARCH_GIC_MAINT_IRQ 9 47 48 #define ARCH_TIMER_VIRT_IRQ 11 49 #define ARCH_TIMER_S_EL1_IRQ 13 50 #define ARCH_TIMER_NS_EL1_IRQ 14 51 #define ARCH_TIMER_NS_EL2_IRQ 10 52 53 #define VIRTUAL_PMU_IRQ 7 54 55 #define PPI(irq) ((irq) + 16) 56 57 /* See Linux kernel arch/arm64/include/asm/pvclock-abi.h */ 58 #define PVTIME_SIZE_PER_CPU 64 59 60 enum { 61 VIRT_FLASH, 62 VIRT_MEM, 63 VIRT_CPUPERIPHS, 64 VIRT_GIC_DIST, 65 VIRT_GIC_CPU, 66 VIRT_GIC_V2M, 67 VIRT_GIC_HYP, 68 VIRT_GIC_VCPU, 69 VIRT_GIC_ITS, 70 VIRT_GIC_REDIST, 71 VIRT_SMMU, 72 VIRT_UART, 73 VIRT_MMIO, 74 VIRT_RTC, 75 VIRT_FW_CFG, 76 VIRT_PCIE, 77 VIRT_PCIE_MMIO, 78 VIRT_PCIE_PIO, 79 VIRT_PCIE_ECAM, 80 VIRT_PLATFORM_BUS, 81 VIRT_GPIO, 82 VIRT_SECURE_UART, 83 VIRT_SECURE_MEM, 84 VIRT_SECURE_GPIO, 85 VIRT_PCDIMM_ACPI, 86 VIRT_ACPI_GED, 87 VIRT_NVDIMM_ACPI, 88 VIRT_PVTIME, 89 VIRT_LOWMEMMAP_LAST, 90 }; 91 92 /* indices of IO regions located after the RAM */ 93 enum { 94 VIRT_HIGH_GIC_REDIST2 = VIRT_LOWMEMMAP_LAST, 95 VIRT_HIGH_PCIE_ECAM, 96 VIRT_HIGH_PCIE_MMIO, 97 }; 98 99 typedef enum VirtIOMMUType { 100 VIRT_IOMMU_NONE, 101 VIRT_IOMMU_SMMUV3, 102 VIRT_IOMMU_VIRTIO, 103 } VirtIOMMUType; 104 105 typedef enum VirtMSIControllerType { 106 VIRT_MSI_CTRL_NONE, 107 VIRT_MSI_CTRL_GICV2M, 108 VIRT_MSI_CTRL_ITS, 109 } VirtMSIControllerType; 110 111 typedef enum VirtGICType { 112 VIRT_GIC_VERSION_MAX, 113 VIRT_GIC_VERSION_HOST, 114 VIRT_GIC_VERSION_2, 115 VIRT_GIC_VERSION_3, 116 VIRT_GIC_VERSION_4, 117 VIRT_GIC_VERSION_NOSEL, 118 } VirtGICType; 119 120 struct VirtMachineClass { 121 MachineClass parent; 122 bool disallow_affinity_adjustment; 123 bool no_its; 124 bool no_tcg_its; 125 bool no_pmu; 126 bool claim_edge_triggered_timers; 127 bool smbios_old_sys_ver; 128 bool no_highmem_compact; 129 bool no_highmem_ecam; 130 bool no_ged; /* Machines < 4.2 have no support for ACPI GED device */ 131 bool kvm_no_adjvtime; 132 bool no_kvm_steal_time; 133 bool acpi_expose_flash; 134 bool no_secure_gpio; 135 /* Machines < 6.2 have no support for describing cpu topology to guest */ 136 bool no_cpu_topology; 137 bool no_tcg_lpa2; 138 }; 139 140 struct VirtMachineState { 141 MachineState parent; 142 Notifier machine_done; 143 DeviceState *platform_bus_dev; 144 FWCfgState *fw_cfg; 145 PFlashCFI01 *flash[2]; 146 bool secure; 147 bool highmem; 148 bool highmem_compact; 149 bool highmem_ecam; 150 bool highmem_mmio; 151 bool highmem_redists; 152 bool its; 153 bool tcg_its; 154 bool virt; 155 bool ras; 156 bool mte; 157 bool dtb_randomness; 158 OnOffAuto acpi; 159 VirtGICType gic_version; 160 VirtIOMMUType iommu; 161 bool default_bus_bypass_iommu; 162 VirtMSIControllerType msi_controller; 163 uint16_t virtio_iommu_bdf; 164 struct arm_boot_info bootinfo; 165 MemMapEntry *memmap; 166 char *pciehb_nodename; 167 const int *irqmap; 168 int fdt_size; 169 uint32_t clock_phandle; 170 uint32_t gic_phandle; 171 uint32_t msi_phandle; 172 uint32_t iommu_phandle; 173 int psci_conduit; 174 hwaddr highest_gpa; 175 DeviceState *gic; 176 DeviceState *acpi_dev; 177 Notifier powerdown_notifier; 178 PCIBus *bus; 179 char *oem_id; 180 char *oem_table_id; 181 }; 182 183 #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM) 184 185 #define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("virt") 186 OBJECT_DECLARE_TYPE(VirtMachineState, VirtMachineClass, VIRT_MACHINE) 187 188 void virt_acpi_setup(VirtMachineState *vms); 189 bool virt_is_acpi_enabled(VirtMachineState *vms); 190 191 /* Return number of redistributors that fit in the specified region */ 192 static uint32_t virt_redist_capacity(VirtMachineState *vms, int region) 193 { 194 uint32_t redist_size; 195 196 if (vms->gic_version == VIRT_GIC_VERSION_3) { 197 redist_size = GICV3_REDIST_SIZE; 198 } else { 199 redist_size = GICV4_REDIST_SIZE; 200 } 201 return vms->memmap[region].size / redist_size; 202 } 203 204 /* Return the number of used redistributor regions */ 205 static inline int virt_gicv3_redist_region_count(VirtMachineState *vms) 206 { 207 uint32_t redist0_capacity = virt_redist_capacity(vms, VIRT_GIC_REDIST); 208 209 assert(vms->gic_version != VIRT_GIC_VERSION_2); 210 211 return (MACHINE(vms)->smp.cpus > redist0_capacity && 212 vms->highmem_redists) ? 2 : 1; 213 } 214 215 #endif /* QEMU_ARM_VIRT_H */ 216